【大紀元2018年04月14日訊】讀者Henry問：李先生您好！我的車是2010年Toyota Venza V6。只開了大約5萬英里。車速達到70英里或以上時方向盤會抖。當車速45英里以上時踩剎車也會抖。還有個毛病，在顛簸路面時，方向盤柱裡面發出「格格」聲。有人說是有個螺絲鬆了。要擰緊它就必須換安全氣袋。
換了新輪胎，做了兩次平衡還是沒用。應該不是輪胎的毛病。我猜方向盤柱的噪音和抖動可能是同一個病因？
懇請李先生解惑，不勝感激！頌安！
李進答：Henry您好，
1) 車速達到70英里以上方向盤抖動表示前輪平衡Balance不對，如果平衡已經做過，則需要檢查輪轂是否有所被馬路邊撞過有點變形。再就是前輪懸掛系統的是否有所鬆脫？需要檢查一下，並做一下前輪定位Alignment。
2) 踩剎車抖動表示前輪剎車盤有所變形，需要打磨或更換。
3) 方向盤的噪音需要檢查方向盤柱Steering Column和前輪懸掛系統的連桿鬆動有關。請檢查。
讀者Dave Liu 問：Dear technician Mr. Lee, I recently bought a 2004 Honda Civic at 16,730 Kilometers, and I found out that the engine oil from the car is very dark black in coloration. My technician has informed me that the oil has just been changed and that the engine oil is very black because the car has not been used for a long duration of time. Furthermore, when I drive my car more often and the oil change on time the color will return back to normal and the technician has told me that the black coloration will not affect the car’s performance. Also he said that the Civic car is unable to change the original battery connector. I was wondering if both of these statements provided to me by my technician were true and if you were able to provide me with any other reasons as to why the engine coloration would be black.
Thank you for your time, your help will be greatly appreciated! Happy New year!
李進師傅你好，我最近買了一輛2004款本田思域，裡數是16,730公里。我發現這輛車的發動機油顏色非常黑。我的技術人員告訴我，機油是剛過了的，機油很黑是因為這輛車已經長時間沒有使用過。此外，當我開車幾次後，機油顏色便恢復正常，技術人員還告訴我，黑色機油不會影響汽車的性能。他還表示，思域是無法更換原裝電池連接器。我想知道技術人員向我提供的這兩個訊息是否屬實，並且是否能夠提供任何原因，為甚麼發動機顏色是黑色的？
感謝您的時間，您的幫助將不勝感激！
李進答：Hi Dave, All motor oil contains cleaning agent additive required by the API(American Petroleum Institute) and SAE (Society of Automotive Engineers).The motor oil should be clear and golden color when first changed. If you open a can or bottle of motor oil the color is clear and golden.
However, as the engine operates, the motor oil cleaning agent will continue to collect and neutralize the harmful chemical byproducts from the combustion within the engine, including soots, and other hydrocarbon compounds, which will cause the oil gradually change color and darken. As long as you change motor oil according to the car manufacturer’s requirement (usually for regular motor oil it is every six months or 6,000 miles whichever comes first, or for synthetic motor oil it is every 12 months or 12000 miles whichever comes first.)
Always change oil filter with every oil change, and stick to original OEM oil filter as much as you can, avoid cheap oil filter.
Dave你好，所有機油含有API所需的清潔劑添加劑（美國石油學會）和SAE（汽車工程師協會）。第一次更換時機油應該是清澈的金黃色。如果你打開一罐或一瓶機油，顏色清晰而金黃。
但是，當發動機運轉時，機油清潔劑將會發揮作用繼續收集和中和有害的化學副產品，包括煤煙和其他碳氫化合物化合物，這會導致機油逐漸變色並變暗。只要你根據汽車製造商的情況更換機油要求（普通機油通常每六個月或6,000英里進行一次，以先到者為準，或者合成機油是每12個月或12,000英里，以先到者為準。）
每次更換機油時都要更換機油濾清器，並儘可能使用原裝OEM機油及過濾器，避免使用廉價的機油及過濾器。
李進
具三十餘年汽車維修保養經驗，對汽車買賣也很熟悉。
如果您有汽車維修與保養方面的問題，歡迎發信至car_qna@epochtimes.com，本報將轉發李進解答。來信請註明汽車型號、牌子及年份。◇
